Pulley



May 13, 1930.

A. P. STRONG Filed Jan. 2, 1924 Patented May 13, 1930 i ing it to shafts offdifferentdiameters and f UNITED STATES ARTHUR P. STRONG, OF MISHAWAKA, rimienm AssIenon-ro nonenmAnurnorun- ING CORPORATION, OEMISHAWAKA,IND1. ANA,'A conronnrronon DE WA rULnnY" Applicationfil ed January 2, 1924 .$eria 1No. 683,848. 7

This invention aims to provide a standard-v lengths.

The inventionmay be'understoodby reference to one illustrative embodiment shownin the accompanying drawings 1n which: V

Figure 1 is a diametric SQCtlOIlof the pulley;

Fig. 2 is an end elevation'of the same;

Fig. 3 is a side elevation of the hub;

Fig. 4: is an end elevation showing the pulley mounted upon a smaller shaft.

The illustrative pulley, designed for electric motor shafts, has its main parts of standard uniform sizes forapplication to any shaft within a wide range of different diameters and lengths, while only a single part (and that of simple and inexpensive construction) need be changed to suit the pulley to any shaft within that range.- i

The main parts, which are standardfor a i variety ofshaft sizes, comprise the pulley shell and the devices for securing it to a removable hub; The hubs are of standard exterior form and dimensions and can be in-. terchangeablyassembled with the pulley shell and securing devices; but different hubs have different bores to accommodate shafts f different diameters.

his to be understood that the illustrative form shown in the drawings issimply a pre-v ferred embodiment of the invention ;-and that in the following explanation of that: specificform, the described details of structure and organization are merely exemplary.

' The pulley shell 5, of laminatedwood, is

- interiorly fitted with a steel sleeve 6, which is rigidly secured to the shell by being pinched or upset at intervals, asindicated at 7. Such a shell may be manufactured in a single size for application to shafts of various: diameters.

Within the steelsleeve are two spaced split ofthe rings and threaded into. the other. These rings 8 have cylindricalouter sur faces and frusto-conical inner surfaces; and, to'fac1l1tatethe1r expansion and contraction,

w ofzthe split rings. Said frusto-conical seats with a.shorter;shaft without requirin eachhas a number of radial notches or f raw I ized pulley having means for. readily securtional splits 10. In practice, therings are of V uniform standard size, made of castiron, and

are of such diameter that .they'initially fit .riorlyT with frustolconical seats 12 comple-' mentary to the frustorconical innersurfaces 12 at opposite ends of the huh, are oppositely inclined, sothat when'thebolts or screws 9 v are turned to draw the splitrings 8, Stoward each, other, the rings will he wedged between the outer shell'5and the hub 11 causing a simultaneous contraction ofthe hub to grip the shaft, and expansion of the rings to grip the-pulley shell; Thisserves to secure the i pulley parts firmly together and to fix the pulley as a whole upon the shaft. V

7 .The hubll has at one end (Fig. ,3) a number of adjacent frusto-conical seats 12 any of which will-mate with one of the clamping rings. IniFig. 1, the left-hand clamping r ng isshown applied to the outermost frustoconical seat '12, but it could be applied: to the second or any other such surface; and the end of the'hub may be cutoff as indicated by; the

dotted line in'Fig. 1,' to shortenit' for use y change inthe ingrings. I I

Figs; 1 shaft13 of relatively largesize but as shown in Fig. 4 it is readily made fast to a'sm'aller 'ffraction'alsplits 14E: torender it readily con-' traetible to] grip the, shaft.

1. The described construct1on permit s the u pulley shell tobe mounted upon shortas well clamping rings 8 connected by several ma-[ chine bolts or screws9 passing through one as long; shafts :and on shafts of widelydiifere e dpi l y l re a and-2 show the pulley applied toa V s5 shaft 13 by replacing hub 'll'with a similar 'ent diameters; The shell and rings are stand;

)ard and'jinte'rchangeable and thereforelend f themselves to, quantity production and only the'hubslneed be changed to fit the shell to F different sizes of shafts; Also, the pulley 7 r shell, the clamping rings, the'hub, and the shaft are all mutually adjustable to desired relations, by relatively moving them either axially of the shaft or circumferentially; and

when adjusted theymay be clamped securely and permanently together, 7 s v Obviously the inventionis not limitedto the, embodiment herein shown and described claimed is a a w Aipulley comprising in combination; p g r shell; a bushing having anumber of securing surfaces arranged tobe used alternatively i; permitting one or more thereof to be removed to shorten the bushing-to suit. a'selected shaft: 15 length; andmeans. intermediate the shell and bushing,,constructed andfarranged to-cooperate with; any saidsecuring surface, to rse-h curetheshell andbushi'ngtogether. i s a 2'; A pulley comprising; incombinati omya 20 pulley shell; a pairofexpan-sible. rings with- V in the shell; a contractible bushing within said rings andhaving a series of'alternativd ly-usable securing surfaces; one ring being engageable with any' one ofsaid securing surfaces; and means for causing said rings to secure the shell and bushing together. a V 3. A pulley comprising; in combination, 5a, pulley shell made upof a plurality of wooden lam-inations andaninternal metallic sleeve permanently locked to andwi th'in the shell, the whole comprising a standardized unit designed for use with shafts of different 7 diameters; and a shaft securing meansgfor j the shell expansible within the, shell and simultaneously contractible upon the shaft to lock the shell to the-shaft. V T l. As. an articleof manufacture; the com,- bination of a pulley shell made up of a plurality ofwooden laminations: and an internal 40 metallic sleeveilocked toiand within the lami- V nations and. having :a cylindrical interior;

means within the shell to apply pressure aegis of the pulley;and-agseparate contractible I s p rlhushing agrranged' to be contractedby said a v 1 g a i p I a 1 meanslto grip a shaft; the whole being con s V W V a stLuc-tejd and-arranged to secure the shell to the bushing and: the bushing to a shaft'gby a 50 frictional grip; alone, andto permit ready neg placement of the bushing by another bnshing of the same'exteriordimensions but of different interiorbore;1whereby the: shell; the bushing; said: pressure; means, the "shaft; are all mutually adjustable to; desired rela tions by relatively ,movinggthem; either- "axially of the shaft or cincumferenti-ally, and the shell is susceptible of ready 'usewithibushings of different, bores to suit shafts Ofdiflerent In testimony whereof, I? have signed-1 my nameto; this specificatiom ameness-now;

,--radial-'l-y, simultaneously toward andfrom the 7 

